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3dapp/libs/three/jsm/shaders/FXAAShader.js

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import {
Vector2
} from '../../../build/three.module.js';
/**
* NVIDIA FXAA by Timothy Lottes
* http://timothylottes.blogspot.com/2011/06/fxaa3-source-released.html
* - WebGL port by @supereggbert
* http://www.glge.org/demos/fxaa/
*/
const FXAAShader = {
uniforms: {
'tDiffuse': { value: null },
'resolution': { value: new Vector2( 1 / 1024, 1 / 512 ) }
},
vertexShader: /* glsl */`
varying vec2 vUv;
void main() {
vUv = uv;
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
}`,
fragmentShader:
// FXAA 3.11 implementation by NVIDIA, ported to WebGL by Agost Biro (biro@archilogic.com)
//----------------------------------------------------------------------------------
// File: es3-kepler\FXAA\assets\shaders/FXAA_DefaultES.frag
// SDK Version: v3.00
// Email: gameworks@nvidia.com
// Site: http://developer.nvidia.com/
//
// Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of NVIDIA CORPORATION nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS\'\' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//----------------------------------------------------------------------------------
/* glsl */`
precision highp float;
uniform sampler2D tDiffuse;
uniform vec2 resolution;
varying vec2 vUv;
#define FXAA_PC 1
#define FXAA_GLSL_100 1
#define FXAA_QUALITY_PRESET 12
#define FXAA_GREEN_AS_LUMA 1
/*--------------------------------------------------------------------------*/
#ifndef FXAA_PC_CONSOLE
//
// The console algorithm for PC is included
// for developers targeting really low spec machines.
// Likely better to just run FXAA_PC, and use a really low preset.
//
#define FXAA_PC_CONSOLE 0
#endif
/*--------------------------------------------------------------------------*/
#ifndef FXAA_GLSL_120
#define FXAA_GLSL_120 0
#endif
/*--------------------------------------------------------------------------*/
#ifndef FXAA_GLSL_130
#define FXAA_GLSL_130 0
#endif
/*--------------------------------------------------------------------------*/
#ifndef FXAA_HLSL_3
#define FXAA_HLSL_3 0
#endif
/*--------------------------------------------------------------------------*/
#ifndef FXAA_HLSL_4
#define FXAA_HLSL_4 0
#endif
/*--------------------------------------------------------------------------*/
#ifndef FXAA_HLSL_5
#define FXAA_HLSL_5 0
#endif
/*==========================================================================*/
#ifndef FXAA_GREEN_AS_LUMA
//
// For those using non-linear color,
// and either not able to get luma in alpha, or not wanting to,
// this enables FXAA to run using green as a proxy for luma.
// So with this enabled, no need to pack luma in alpha.
//
// This will turn off AA on anything which lacks some amount of green.
// Pure red and blue or combination of only R and B, will get no AA.
//
// Might want to lower the settings for both,
// fxaaConsoleEdgeThresholdMin
// fxaaQualityEdgeThresholdMin
// In order to insure AA does not get turned off on colors
// which contain a minor amount of green.
//
// 1 = On.
// 0 = Off.
//
#define FXAA_GREEN_AS_LUMA 0
#endif
/*--------------------------------------------------------------------------*/
#ifndef FXAA_EARLY_EXIT
//
// Controls algorithm\'s early exit path.
// On PS3 turning this ON adds 2 cycles to the shader.
// On 360 turning this OFF adds 10ths of a millisecond to the shader.
// Turning this off on console will result in a more blurry image.
// So this defaults to on.
//
// 1 = On.
// 0 = Off.
//
#define FXAA_EARLY_EXIT 1
#endif
/*--------------------------------------------------------------------------*/
#ifndef FXAA_DISCARD
//
// Only valid for PC OpenGL currently.
// Probably will not work when FXAA_GREEN_AS_LUMA = 1.
//
// 1 = Use discard on pixels which don\'t need AA.
// For APIs which enable concurrent TEX+ROP from same surface.
// 0 = Return unchanged color on pixels which don\'t need AA.
//
#define FXAA_DISCARD 0
#endif
/*--------------------------------------------------------------------------*/
#ifndef FXAA_FAST_PIXEL_OFFSET
//
// Used for GLSL 120 only.
//
// 1 = GL API supports fast pixel offsets
// 0 = do not use fast pixel offsets
//
#ifdef GL_EXT_gpu_shader4
#define FXAA_FAST_PIXEL_OFFSET 1
#endif
#ifdef GL_NV_gpu_shader5
#define FXAA_FAST_PIXEL_OFFSET 1
#endif
#ifdef GL_ARB_gpu_shader5
#define FXAA_FAST_PIXEL_OFFSET 1
#endif
#ifndef FXAA_FAST_PIXEL_OFFSET
#define FXAA_FAST_PIXEL_OFFSET 0
#endif
#endif
/*--------------------------------------------------------------------------*/
#ifndef FXAA_GATHER4_ALPHA
//
// 1 = API supports gather4 on alpha channel.
// 0 = API does not support gather4 on alpha channel.
//
#if (FXAA_HLSL_5 == 1)
#define FXAA_GATHER4_ALPHA 1
#endif
#ifdef GL_ARB_gpu_shader5
#define FXAA_GATHER4_ALPHA 1
#endif
#ifdef GL_NV_gpu_shader5
#define FXAA_GATHER4_ALPHA 1
#endif
#ifndef FXAA_GATHER4_ALPHA
#define FXAA_GATHER4_ALPHA 0
#endif
#endif
/*============================================================================
FXAA QUALITY - TUNING KNOBS
------------------------------------------------------------------------------
NOTE the other tuning knobs are now in the shader function inputs!
============================================================================*/
#ifndef FXAA_QUALITY_PRESET
//
// Choose the quality preset.
// This needs to be compiled into the shader as it effects code.
// Best option to include multiple presets is to
// in each shader define the preset, then include this file.
//
// OPTIONS
// -----------------------------------------------------------------------
// 10 to 15 - default medium dither (10=fastest, 15=highest quality)
// 20 to 29 - less dither, more expensive (20=fastest, 29=highest quality)
// 39 - no dither, very expensive
//
// NOTES
// -----------------------------------------------------------------------
// 12 = slightly faster then FXAA 3.9 and higher edge quality (default)
// 13 = about same speed as FXAA 3.9 and better than 12
// 23 = closest to FXAA 3.9 visually and performance wise
// _ = the lowest digit is directly related to performance
// _ = the highest digit is directly related to style
//
#define FXAA_QUALITY_PRESET 12
#endif
/*============================================================================
FXAA QUALITY - PRESETS
============================================================================*/
/*============================================================================
FXAA QUALITY - MEDIUM DITHER PRESETS
============================================================================*/
#if (FXAA_QUALITY_PRESET == 10)
#define FXAA_QUALITY_PS 3
#define FXAA_QUALITY_P0 1.5
#define FXAA_QUALITY_P1 3.0
#define FXAA_QUALITY_P2 12.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 11)
#define FXAA_QUALITY_PS 4
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 3.0
#define FXAA_QUALITY_P3 12.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 12)
#define FXAA_QUALITY_PS 5
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 2.0
#define FXAA_QUALITY_P3 4.0
#define FXAA_QUALITY_P4 12.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 13)
#define FXAA_QUALITY_PS 6
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 2.0
#define FXAA_QUALITY_P3 2.0
#define FXAA_QUALITY_P4 4.0
#define FXAA_QUALITY_P5 12.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 14)
#define FXAA_QUALITY_PS 7
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 2.0
#define FXAA_QUALITY_P3 2.0
#define FXAA_QUALITY_P4 2.0
#define FXAA_QUALITY_P5 4.0
#define FXAA_QUALITY_P6 12.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 15)
#define FXAA_QUALITY_PS 8
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 2.0
#define FXAA_QUALITY_P3 2.0
#define FXAA_QUALITY_P4 2.0
#define FXAA_QUALITY_P5 2.0
#define FXAA_QUALITY_P6 4.0
#define FXAA_QUALITY_P7 12.0
#endif
/*============================================================================
FXAA QUALITY - LOW DITHER PRESETS
============================================================================*/
#if (FXAA_QUALITY_PRESET == 20)
#define FXAA_QUALITY_PS 3
#define FXAA_QUALITY_P0 1.5
#define FXAA_QUALITY_P1 2.0
#define FXAA_QUALITY_P2 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 21)
#define FXAA_QUALITY_PS 4
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 2.0
#define FXAA_QUALITY_P3 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 22)
#define FXAA_QUALITY_PS 5
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 2.0
#define FXAA_QUALITY_P3 2.0
#define FXAA_QUALITY_P4 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 23)
#define FXAA_QUALITY_PS 6
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 2.0
#define FXAA_QUALITY_P3 2.0
#define FXAA_QUALITY_P4 2.0
#define FXAA_QUALITY_P5 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 24)
#define FXAA_QUALITY_PS 7
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 2.0
#define FXAA_QUALITY_P3 2.0
#define FXAA_QUALITY_P4 2.0
#define FXAA_QUALITY_P5 3.0
#define FXAA_QUALITY_P6 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 25)
#define FXAA_QUALITY_PS 8
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 2.0
#define FXAA_QUALITY_P3 2.0
#define FXAA_QUALITY_P4 2.0
#define FXAA_QUALITY_P5 2.0
#define FXAA_QUALITY_P6 4.0
#define FXAA_QUALITY_P7 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 26)
#define FXAA_QUALITY_PS 9
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 2.0
#define FXAA_QUALITY_P3 2.0
#define FXAA_QUALITY_P4 2.0
#define FXAA_QUALITY_P5 2.0
#define FXAA_QUALITY_P6 2.0
#define FXAA_QUALITY_P7 4.0
#define FXAA_QUALITY_P8 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 27)
#define FXAA_QUALITY_PS 10
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 2.0
#define FXAA_QUALITY_P3 2.0
#define FXAA_QUALITY_P4 2.0
#define FXAA_QUALITY_P5 2.0
#define FXAA_QUALITY_P6 2.0
#define FXAA_QUALITY_P7 2.0
#define FXAA_QUALITY_P8 4.0
#define FXAA_QUALITY_P9 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 28)
#define FXAA_QUALITY_PS 11
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 2.0
#define FXAA_QUALITY_P3 2.0
#define FXAA_QUALITY_P4 2.0
#define FXAA_QUALITY_P5 2.0
#define FXAA_QUALITY_P6 2.0
#define FXAA_QUALITY_P7 2.0
#define FXAA_QUALITY_P8 2.0
#define FXAA_QUALITY_P9 4.0
#define FXAA_QUALITY_P10 8.0
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PRESET == 29)
#define FXAA_QUALITY_PS 12
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.5
#define FXAA_QUALITY_P2 2.0
#define FXAA_QUALITY_P3 2.0
#define FXAA_QUALITY_P4 2.0
#define FXAA_QUALITY_P5 2.0
#define FXAA_QUALITY_P6 2.0
#define FXAA_QUALITY_P7 2.0
#define FXAA_QUALITY_P8 2.0
#define FXAA_QUALITY_P9 2.0
#define FXAA_QUALITY_P10 4.0
#define FXAA_QUALITY_P11 8.0
#endif
/*============================================================================
FXAA QUALITY - EXTREME QUALITY
============================================================================*/
#if (FXAA_QUALITY_PRESET == 39)
#define FXAA_QUALITY_PS 12
#define FXAA_QUALITY_P0 1.0
#define FXAA_QUALITY_P1 1.0
#define FXAA_QUALITY_P2 1.0
#define FXAA_QUALITY_P3 1.0
#define FXAA_QUALITY_P4 1.0
#define FXAA_QUALITY_P5 1.5
#define FXAA_QUALITY_P6 2.0
#define FXAA_QUALITY_P7 2.0
#define FXAA_QUALITY_P8 2.0
#define FXAA_QUALITY_P9 2.0
#define FXAA_QUALITY_P10 4.0
#define FXAA_QUALITY_P11 8.0
#endif
/*============================================================================
API PORTING
============================================================================*/
#if (FXAA_GLSL_100 == 1) || (FXAA_GLSL_120 == 1) || (FXAA_GLSL_130 == 1)
#define FxaaBool bool
#define FxaaDiscard discard
#define FxaaFloat float
#define FxaaFloat2 vec2
#define FxaaFloat3 vec3
#define FxaaFloat4 vec4
#define FxaaHalf float
#define FxaaHalf2 vec2
#define FxaaHalf3 vec3
#define FxaaHalf4 vec4
#define FxaaInt2 ivec2
#define FxaaSat(x) clamp(x, 0.0, 1.0)
#define FxaaTex sampler2D
#else
#define FxaaBool bool
#define FxaaDiscard clip(-1)
#define FxaaFloat float
#define FxaaFloat2 float2
#define FxaaFloat3 float3
#define FxaaFloat4 float4
#define FxaaHalf half
#define FxaaHalf2 half2
#define FxaaHalf3 half3
#define FxaaHalf4 half4
#define FxaaSat(x) saturate(x)
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_GLSL_100 == 1)
#define FxaaTexTop(t, p) texture2D(t, p, 0.0)
#define FxaaTexOff(t, p, o, r) texture2D(t, p + (o * r), 0.0)
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_GLSL_120 == 1)
// Requires,
// #version 120
// And at least,
// #extension GL_EXT_gpu_shader4 : enable
// (or set FXAA_FAST_PIXEL_OFFSET 1 to work like DX9)
#define FxaaTexTop(t, p) texture2DLod(t, p, 0.0)
#if (FXAA_FAST_PIXEL_OFFSET == 1)
#define FxaaTexOff(t, p, o, r) texture2DLodOffset(t, p, 0.0, o)
#else
#define FxaaTexOff(t, p, o, r) texture2DLod(t, p + (o * r), 0.0)
#endif
#if (FXAA_GATHER4_ALPHA == 1)
// use #extension GL_ARB_gpu_shader5 : enable
#define FxaaTexAlpha4(t, p) textureGather(t, p, 3)
#define FxaaTexOffAlpha4(t, p, o) textureGatherOffset(t, p, o, 3)
#define FxaaTexGreen4(t, p) textureGather(t, p, 1)
#define FxaaTexOffGreen4(t, p, o) textureGatherOffset(t, p, o, 1)
#endif
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_GLSL_130 == 1)
// Requires "#version 130" or better
#define FxaaTexTop(t, p) textureLod(t, p, 0.0)
#define FxaaTexOff(t, p, o, r) textureLodOffset(t, p, 0.0, o)
#if (FXAA_GATHER4_ALPHA == 1)
// use #extension GL_ARB_gpu_shader5 : enable
#define FxaaTexAlpha4(t, p) textureGather(t, p, 3)
#define FxaaTexOffAlpha4(t, p, o) textureGatherOffset(t, p, o, 3)
#define FxaaTexGreen4(t, p) textureGather(t, p, 1)
#define FxaaTexOffGreen4(t, p, o) textureGatherOffset(t, p, o, 1)
#endif
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_HLSL_3 == 1)
#define FxaaInt2 float2
#define FxaaTex sampler2D
#define FxaaTexTop(t, p) tex2Dlod(t, float4(p, 0.0, 0.0))
#define FxaaTexOff(t, p, o, r) tex2Dlod(t, float4(p + (o * r), 0, 0))
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_HLSL_4 == 1)
#define FxaaInt2 int2
struct FxaaTex { SamplerState smpl; Texture2D tex; };
#define FxaaTexTop(t, p) t.tex.SampleLevel(t.smpl, p, 0.0)
#define FxaaTexOff(t, p, o, r) t.tex.SampleLevel(t.smpl, p, 0.0, o)
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_HLSL_5 == 1)
#define FxaaInt2 int2
struct FxaaTex { SamplerState smpl; Texture2D tex; };
#define FxaaTexTop(t, p) t.tex.SampleLevel(t.smpl, p, 0.0)
#define FxaaTexOff(t, p, o, r) t.tex.SampleLevel(t.smpl, p, 0.0, o)
#define FxaaTexAlpha4(t, p) t.tex.GatherAlpha(t.smpl, p)
#define FxaaTexOffAlpha4(t, p, o) t.tex.GatherAlpha(t.smpl, p, o)
#define FxaaTexGreen4(t, p) t.tex.GatherGreen(t.smpl, p)
#define FxaaTexOffGreen4(t, p, o) t.tex.GatherGreen(t.smpl, p, o)
#endif
/*============================================================================
GREEN AS LUMA OPTION SUPPORT FUNCTION
============================================================================*/
#if (FXAA_GREEN_AS_LUMA == 0)
FxaaFloat FxaaLuma(FxaaFloat4 rgba) { return rgba.w; }
#else
FxaaFloat FxaaLuma(FxaaFloat4 rgba) { return rgba.y; }
#endif
/*============================================================================
FXAA3 QUALITY - PC
============================================================================*/
#if (FXAA_PC == 1)
/*--------------------------------------------------------------------------*/
FxaaFloat4 FxaaPixelShader(
//
// Use noperspective interpolation here (turn off perspective interpolation).
// {xy} = center of pixel
FxaaFloat2 pos,
//
// Used only for FXAA Console, and not used on the 360 version.
// Use noperspective interpolation here (turn off perspective interpolation).
// {xy_} = upper left of pixel
// {_zw} = lower right of pixel
FxaaFloat4 fxaaConsolePosPos,
//
// Input color texture.
// {rgb_} = color in linear or perceptual color space
// if (FXAA_GREEN_AS_LUMA == 0)
// {__a} = luma in perceptual color space (not linear)
FxaaTex tex,
//
// Only used on the optimized 360 version of FXAA Console.
// For everything but 360, just use the same input here as for "tex".
// For 360, same texture, just alias with a 2nd sampler.
// This sampler needs to have an exponent bias of -1.
FxaaTex fxaaConsole360TexExpBiasNegOne,
//
// Only used on the optimized 360 version of FXAA Console.
// For everything but 360, just use the same input here as for "tex".
// For 360, same texture, just alias with a 3nd sampler.
// This sampler needs to have an exponent bias of -2.
FxaaTex fxaaConsole360TexExpBiasNegTwo,
//
// Only used on FXAA Quality.
// This must be from a constant/uniform.
// {x_} = 1.0/screenWidthInPixels
// {_y} = 1.0/screenHeightInPixels
FxaaFloat2 fxaaQualityRcpFrame,
//
// Only used on FXAA Console.
// This must be from a constant/uniform.
// This effects sub-pixel AA quality and inversely sharpness.
// Where N ranges between,
// N = 0.50 (default)
// N = 0.33 (sharper)
// {x__} = -N/screenWidthInPixels
// {_y_} = -N/screenHeightInPixels
// {_z_} = N/screenWidthInPixels
// {__w} = N/screenHeightInPixels
FxaaFloat4 fxaaConsoleRcpFrameOpt,
//
// Only used on FXAA Console.
// Not used on 360, but used on PS3 and PC.
// This must be from a constant/uniform.
// {x__} = -2.0/screenWidthInPixels
// {_y_} = -2.0/screenHeightInPixels
// {_z_} = 2.0/screenWidthInPixels
// {__w} = 2.0/screenHeightInPixels
FxaaFloat4 fxaaConsoleRcpFrameOpt2,
//
// Only used on FXAA Console.
// Only used on 360 in place of fxaaConsoleRcpFrameOpt2.
// This must be from a constant/uniform.
// {x__} = 8.0/screenWidthInPixels
// {_y_} = 8.0/screenHeightInPixels
// {_z_} = -4.0/screenWidthInPixels
// {__w} = -4.0/screenHeightInPixels
FxaaFloat4 fxaaConsole360RcpFrameOpt2,
//
// Only used on FXAA Quality.
// This used to be the FXAA_QUALITY_SUBPIX define.
// It is here now to allow easier tuning.
// Choose the amount of sub-pixel aliasing removal.
// This can effect sharpness.
// 1.00 - upper limit (softer)
// 0.75 - default amount of filtering
// 0.50 - lower limit (sharper, less sub-pixel aliasing removal)
// 0.25 - almost off
// 0.00 - completely off
FxaaFloat fxaaQualitySubpix,
//
// Only used on FXAA Quality.
// This used to be the FXAA_QUALITY_EDGE_THRESHOLD define.
// It is here now to allow easier tuning.
// The minimum amount of local contrast required to apply algorithm.
// 0.333 - too little (faster)
// 0.250 - low quality
// 0.166 - default
// 0.125 - high quality
// 0.063 - overkill (slower)
FxaaFloat fxaaQualityEdgeThreshold,
//
// Only used on FXAA Quality.
// This used to be the FXAA_QUALITY_EDGE_THRESHOLD_MIN define.
// It is here now to allow easier tuning.
// Trims the algorithm from processing darks.
// 0.0833 - upper limit (default, the start of visible unfiltered edges)
// 0.0625 - high quality (faster)
// 0.0312 - visible limit (slower)
// Special notes when using FXAA_GREEN_AS_LUMA,
// Likely want to set this to zero.
// As colors that are mostly not-green
// will appear very dark in the green channel!
// Tune by looking at mostly non-green content,
// then start at zero and increase until aliasing is a problem.
FxaaFloat fxaaQualityEdgeThresholdMin,
//
// Only used on FXAA Console.
// This used to be the FXAA_CONSOLE_EDGE_SHARPNESS define.
// It is here now to allow easier tuning.
// This does not effect PS3, as this needs to be compiled in.
// Use FXAA_CONSOLE_PS3_EDGE_SHARPNESS for PS3.
// Due to the PS3 being ALU bound,
// there are only three safe values here: 2 and 4 and 8.
// These options use the shaders ability to a free *|/ by 2|4|8.
// For all other platforms can be a non-power of two.
// 8.0 is sharper (default!!!)
// 4.0 is softer
// 2.0 is really soft (good only for vector graphics inputs)
FxaaFloat fxaaConsoleEdgeSharpness,
//
// Only used on FXAA Console.
// This used to be the FXAA_CONSOLE_EDGE_THRESHOLD define.
// It is here now to allow easier tuning.
// This does not effect PS3, as this needs to be compiled in.
// Use FXAA_CONSOLE_PS3_EDGE_THRESHOLD for PS3.
// Due to the PS3 being ALU bound,
// there are only two safe values here: 1/4 and 1/8.
// These options use the shaders ability to a free *|/ by 2|4|8.
// The console setting has a different mapping than the quality setting.
// Other platforms can use other values.
// 0.125 leaves less aliasing, but is softer (default!!!)
// 0.25 leaves more aliasing, and is sharper
FxaaFloat fxaaConsoleEdgeThreshold,
//
// Only used on FXAA Console.
// This used to be the FXAA_CONSOLE_EDGE_THRESHOLD_MIN define.
// It is here now to allow easier tuning.
// Trims the algorithm from processing darks.
// The console setting has a different mapping than the quality setting.
// This only applies when FXAA_EARLY_EXIT is 1.
// This does not apply to PS3,
// PS3 was simplified to avoid more shader instructions.
// 0.06 - faster but more aliasing in darks
// 0.05 - default
// 0.04 - slower and less aliasing in darks
// Special notes when using FXAA_GREEN_AS_LUMA,
// Likely want to set this to zero.
// As colors that are mostly not-green
// will appear very dark in the green channel!
// Tune by looking at mostly non-green content,
// then start at zero and increase until aliasing is a problem.
FxaaFloat fxaaConsoleEdgeThresholdMin,
//
// Extra constants for 360 FXAA Console only.
// Use zeros or anything else for other platforms.
// These must be in physical constant registers and NOT immediates.
// Immediates will result in compiler un-optimizing.
// {xyzw} = float4(1.0, -1.0, 0.25, -0.25)
FxaaFloat4 fxaaConsole360ConstDir
) {
/*--------------------------------------------------------------------------*/
FxaaFloat2 posM;
posM.x = pos.x;
posM.y = pos.y;
#if (FXAA_GATHER4_ALPHA == 1)
#if (FXAA_DISCARD == 0)
FxaaFloat4 rgbyM = FxaaTexTop(tex, posM);
#if (FXAA_GREEN_AS_LUMA == 0)
#define lumaM rgbyM.w
#else
#define lumaM rgbyM.y
#endif
#endif
#if (FXAA_GREEN_AS_LUMA == 0)
FxaaFloat4 luma4A = FxaaTexAlpha4(tex, posM);
FxaaFloat4 luma4B = FxaaTexOffAlpha4(tex, posM, FxaaInt2(-1, -1));
#else
FxaaFloat4 luma4A = FxaaTexGreen4(tex, posM);
FxaaFloat4 luma4B = FxaaTexOffGreen4(tex, posM, FxaaInt2(-1, -1));
#endif
#if (FXAA_DISCARD == 1)
#define lumaM luma4A.w
#endif
#define lumaE luma4A.z
#define lumaS luma4A.x
#define lumaSE luma4A.y
#define lumaNW luma4B.w
#define lumaN luma4B.z
#define lumaW luma4B.x
#else
FxaaFloat4 rgbyM = FxaaTexTop(tex, posM);
#if (FXAA_GREEN_AS_LUMA == 0)
#define lumaM rgbyM.w
#else
#define lumaM rgbyM.y
#endif
#if (FXAA_GLSL_100 == 1)
FxaaFloat lumaS = FxaaLuma(FxaaTexOff(tex, posM, FxaaFloat2( 0.0, 1.0), fxaaQualityRcpFrame.xy));
FxaaFloat lumaE = FxaaLuma(FxaaTexOff(tex, posM, FxaaFloat2( 1.0, 0.0), fxaaQualityRcpFrame.xy));
FxaaFloat lumaN = FxaaLuma(FxaaTexOff(tex, posM, FxaaFloat2( 0.0,-1.0), fxaaQualityRcpFrame.xy));
FxaaFloat lumaW = FxaaLuma(FxaaTexOff(tex, posM, FxaaFloat2(-1.0, 0.0), fxaaQualityRcpFrame.xy));
#else
FxaaFloat lumaS = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 0, 1), fxaaQualityRcpFrame.xy));
FxaaFloat lumaE = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 1, 0), fxaaQualityRcpFrame.xy));
FxaaFloat lumaN = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 0,-1), fxaaQualityRcpFrame.xy));
FxaaFloat lumaW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1, 0), fxaaQualityRcpFrame.xy));
#endif
#endif
/*--------------------------------------------------------------------------*/
FxaaFloat maxSM = max(lumaS, lumaM);
FxaaFloat minSM = min(lumaS, lumaM);
FxaaFloat maxESM = max(lumaE, maxSM);
FxaaFloat minESM = min(lumaE, minSM);
FxaaFloat maxWN = max(lumaN, lumaW);
FxaaFloat minWN = min(lumaN, lumaW);
FxaaFloat rangeMax = max(maxWN, maxESM);
FxaaFloat rangeMin = min(minWN, minESM);
FxaaFloat rangeMaxScaled = rangeMax * fxaaQualityEdgeThreshold;
FxaaFloat range = rangeMax - rangeMin;
FxaaFloat rangeMaxClamped = max(fxaaQualityEdgeThresholdMin, rangeMaxScaled);
FxaaBool earlyExit = range < rangeMaxClamped;
/*--------------------------------------------------------------------------*/
if(earlyExit)
#if (FXAA_DISCARD == 1)
FxaaDiscard;
#else
return rgbyM;
#endif
/*--------------------------------------------------------------------------*/
#if (FXAA_GATHER4_ALPHA == 0)
#if (FXAA_GLSL_100 == 1)
FxaaFloat lumaNW = FxaaLuma(FxaaTexOff(tex, posM, FxaaFloat2(-1.0,-1.0), fxaaQualityRcpFrame.xy));
FxaaFloat lumaSE = FxaaLuma(FxaaTexOff(tex, posM, FxaaFloat2( 1.0, 1.0), fxaaQualityRcpFrame.xy));
FxaaFloat lumaNE = FxaaLuma(FxaaTexOff(tex, posM, FxaaFloat2( 1.0,-1.0), fxaaQualityRcpFrame.xy));
FxaaFloat lumaSW = FxaaLuma(FxaaTexOff(tex, posM, FxaaFloat2(-1.0, 1.0), fxaaQualityRcpFrame.xy));
#else
FxaaFloat lumaNW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1,-1), fxaaQualityRcpFrame.xy));
FxaaFloat lumaSE = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 1, 1), fxaaQualityRcpFrame.xy));
FxaaFloat lumaNE = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2( 1,-1), fxaaQualityRcpFrame.xy));
FxaaFloat lumaSW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1, 1), fxaaQualityRcpFrame.xy));
#endif
#else
FxaaFloat lumaNE = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(1, -1), fxaaQualityRcpFrame.xy));
FxaaFloat lumaSW = FxaaLuma(FxaaTexOff(tex, posM, FxaaInt2(-1, 1), fxaaQualityRcpFrame.xy));
#endif
/*--------------------------------------------------------------------------*/
FxaaFloat lumaNS = lumaN + lumaS;
FxaaFloat lumaWE = lumaW + lumaE;
FxaaFloat subpixRcpRange = 1.0/range;
FxaaFloat subpixNSWE = lumaNS + lumaWE;
FxaaFloat edgeHorz1 = (-2.0 * lumaM) + lumaNS;
FxaaFloat edgeVert1 = (-2.0 * lumaM) + lumaWE;
/*--------------------------------------------------------------------------*/
FxaaFloat lumaNESE = lumaNE + lumaSE;
FxaaFloat lumaNWNE = lumaNW + lumaNE;
FxaaFloat edgeHorz2 = (-2.0 * lumaE) + lumaNESE;
FxaaFloat edgeVert2 = (-2.0 * lumaN) + lumaNWNE;
/*--------------------------------------------------------------------------*/
FxaaFloat lumaNWSW = lumaNW + lumaSW;
FxaaFloat lumaSWSE = lumaSW + lumaSE;
FxaaFloat edgeHorz4 = (abs(edgeHorz1) * 2.0) + abs(edgeHorz2);
FxaaFloat edgeVert4 = (abs(edgeVert1) * 2.0) + abs(edgeVert2);
FxaaFloat edgeHorz3 = (-2.0 * lumaW) + lumaNWSW;
FxaaFloat edgeVert3 = (-2.0 * lumaS) + lumaSWSE;
FxaaFloat edgeHorz = abs(edgeHorz3) + edgeHorz4;
FxaaFloat edgeVert = abs(edgeVert3) + edgeVert4;
/*--------------------------------------------------------------------------*/
FxaaFloat subpixNWSWNESE = lumaNWSW + lumaNESE;
FxaaFloat lengthSign = fxaaQualityRcpFrame.x;
FxaaBool horzSpan = edgeHorz >= edgeVert;
FxaaFloat subpixA = subpixNSWE * 2.0 + subpixNWSWNESE;
/*--------------------------------------------------------------------------*/
if(!horzSpan) lumaN = lumaW;
if(!horzSpan) lumaS = lumaE;
if(horzSpan) lengthSign = fxaaQualityRcpFrame.y;
FxaaFloat subpixB = (subpixA * (1.0/12.0)) - lumaM;
/*--------------------------------------------------------------------------*/
FxaaFloat gradientN = lumaN - lumaM;
FxaaFloat gradientS = lumaS - lumaM;
FxaaFloat lumaNN = lumaN + lumaM;
FxaaFloat lumaSS = lumaS + lumaM;
FxaaBool pairN = abs(gradientN) >= abs(gradientS);
FxaaFloat gradient = max(abs(gradientN), abs(gradientS));
if(pairN) lengthSign = -lengthSign;
FxaaFloat subpixC = FxaaSat(abs(subpixB) * subpixRcpRange);
/*--------------------------------------------------------------------------*/
FxaaFloat2 posB;
posB.x = posM.x;
posB.y = posM.y;
FxaaFloat2 offNP;
offNP.x = (!horzSpan) ? 0.0 : fxaaQualityRcpFrame.x;
offNP.y = ( horzSpan) ? 0.0 : fxaaQualityRcpFrame.y;
if(!horzSpan) posB.x += lengthSign * 0.5;
if( horzSpan) posB.y += lengthSign * 0.5;
/*--------------------------------------------------------------------------*/
FxaaFloat2 posN;
posN.x = posB.x - offNP.x * FXAA_QUALITY_P0;
posN.y = posB.y - offNP.y * FXAA_QUALITY_P0;
FxaaFloat2 posP;
posP.x = posB.x + offNP.x * FXAA_QUALITY_P0;
posP.y = posB.y + offNP.y * FXAA_QUALITY_P0;
FxaaFloat subpixD = ((-2.0)*subpixC) + 3.0;
FxaaFloat lumaEndN = FxaaLuma(FxaaTexTop(tex, posN));
FxaaFloat subpixE = subpixC * subpixC;
FxaaFloat lumaEndP = FxaaLuma(FxaaTexTop(tex, posP));
/*--------------------------------------------------------------------------*/
if(!pairN) lumaNN = lumaSS;
FxaaFloat gradientScaled = gradient * 1.0/4.0;
FxaaFloat lumaMM = lumaM - lumaNN * 0.5;
FxaaFloat subpixF = subpixD * subpixE;
FxaaBool lumaMLTZero = lumaMM < 0.0;
/*--------------------------------------------------------------------------*/
lumaEndN -= lumaNN * 0.5;
lumaEndP -= lumaNN * 0.5;
FxaaBool doneN = abs(lumaEndN) >= gradientScaled;
FxaaBool doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY_P1;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY_P1;
FxaaBool doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY_P1;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY_P1;
/*--------------------------------------------------------------------------*/
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY_P2;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY_P2;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY_P2;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY_P2;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PS > 3)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY_P3;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY_P3;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY_P3;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY_P3;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PS > 4)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY_P4;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY_P4;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY_P4;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY_P4;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PS > 5)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY_P5;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY_P5;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY_P5;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY_P5;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PS > 6)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY_P6;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY_P6;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY_P6;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY_P6;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PS > 7)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY_P7;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY_P7;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY_P7;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY_P7;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PS > 8)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY_P8;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY_P8;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY_P8;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY_P8;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PS > 9)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY_P9;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY_P9;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY_P9;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY_P9;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PS > 10)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY_P10;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY_P10;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY_P10;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY_P10;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PS > 11)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY_P11;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY_P11;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY_P11;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY_P11;
/*--------------------------------------------------------------------------*/
#if (FXAA_QUALITY_PS > 12)
if(doneNP) {
if(!doneN) lumaEndN = FxaaLuma(FxaaTexTop(tex, posN.xy));
if(!doneP) lumaEndP = FxaaLuma(FxaaTexTop(tex, posP.xy));
if(!doneN) lumaEndN = lumaEndN - lumaNN * 0.5;
if(!doneP) lumaEndP = lumaEndP - lumaNN * 0.5;
doneN = abs(lumaEndN) >= gradientScaled;
doneP = abs(lumaEndP) >= gradientScaled;
if(!doneN) posN.x -= offNP.x * FXAA_QUALITY_P12;
if(!doneN) posN.y -= offNP.y * FXAA_QUALITY_P12;
doneNP = (!doneN) || (!doneP);
if(!doneP) posP.x += offNP.x * FXAA_QUALITY_P12;
if(!doneP) posP.y += offNP.y * FXAA_QUALITY_P12;
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
#endif
/*--------------------------------------------------------------------------*/
}
/*--------------------------------------------------------------------------*/
FxaaFloat dstN = posM.x - posN.x;
FxaaFloat dstP = posP.x - posM.x;
if(!horzSpan) dstN = posM.y - posN.y;
if(!horzSpan) dstP = posP.y - posM.y;
/*--------------------------------------------------------------------------*/
FxaaBool goodSpanN = (lumaEndN < 0.0) != lumaMLTZero;
FxaaFloat spanLength = (dstP + dstN);
FxaaBool goodSpanP = (lumaEndP < 0.0) != lumaMLTZero;
FxaaFloat spanLengthRcp = 1.0/spanLength;
/*--------------------------------------------------------------------------*/
FxaaBool directionN = dstN < dstP;
FxaaFloat dst = min(dstN, dstP);
FxaaBool goodSpan = directionN ? goodSpanN : goodSpanP;
FxaaFloat subpixG = subpixF * subpixF;
FxaaFloat pixelOffset = (dst * (-spanLengthRcp)) + 0.5;
FxaaFloat subpixH = subpixG * fxaaQualitySubpix;
/*--------------------------------------------------------------------------*/
FxaaFloat pixelOffsetGood = goodSpan ? pixelOffset : 0.0;
FxaaFloat pixelOffsetSubpix = max(pixelOffsetGood, subpixH);
if(!horzSpan) posM.x += pixelOffsetSubpix * lengthSign;
if( horzSpan) posM.y += pixelOffsetSubpix * lengthSign;
#if (FXAA_DISCARD == 1)
return FxaaTexTop(tex, posM);
#else
return FxaaFloat4(FxaaTexTop(tex, posM).xyz, lumaM);
#endif
}
/*==========================================================================*/
#endif
void main() {
gl_FragColor = FxaaPixelShader(
vUv,
vec4(0.0),
tDiffuse,
tDiffuse,
tDiffuse,
resolution,
vec4(0.0),
vec4(0.0),
vec4(0.0),
0.75,
0.166,
0.0833,
0.0,
0.0,
0.0,
vec4(0.0)
);
// TODO avoid querying texture twice for same texel
gl_FragColor.a = texture2D(tDiffuse, vUv).a;
}`
};
export { FXAAShader };